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14．-Must I play computer games every day after school，Mum？
-No，you ________．It's bad for your eyes．（　　）

A．

needn't

B．

don't have to

C．

mustn't

D．

may not

分析 --媽媽，我必須每天放學后玩電腦游戲嗎？
--不，不可以，對你的眼睛有害．

解答答案：C．
結合選項可知本題考查情態動詞，首先明確選項中每個單詞的意思：A：不必；B：沒必要；C：不可以；D：可能不；結合題干推測句意是"--媽媽，我必須每天放學后玩電腦游戲嗎？--不，不可以，對你的眼睛有害．"，所以 mustn't符合句意，故選C．

點評本題考查了情態動詞的用法．解答時首先根據題干明確句意，理解所給選項中每個情態動詞的意思并熟練掌握它們的用法，便可作出正確選擇．

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